Fletcher, Helen Vivienne, 1984- Reactive magic (Series) #bk. 2

Four magical threads drawing her in… One forcing her away. Which will prove more dangerous? When Callie left magic school, she thought the crisis was over. But someone is watching her former classmates, and their power has taken an explosive turn. As the teachers try to force them back to the school, a new threat emerges. Can Callie gain control of the magic, or will it tear all of them to shreds?

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